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Impairment of Long-Lived Assets	3 Months Ended
Impairment of Long-Lived Assets	Aug. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment of Long-Lived Assets	NOTE D – Impairment of Long-Lived Assets As a result of changes in the facts and circumstances related to the planned sale of the Company’s cryogenics business in Turkey, Worthington Aritas, the Company lowered its estimate of fair value less cost to sell to $7,000,000 resulting in an impairment charge of $2,381,000 during the three months ended August 31, 2018. Fair value was determined using observable (Level 2) inputs.